package cc.atliberty.oa.controller;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter
public class MyFilter implements Filter {

    @Override
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        HttpSession session = request.getSession(false);
        if (session != null && session.getAttribute("user") != null){
            chain.doFilter(request,response);
        }else {
            response.sendRedirect(request.getContextPath() + "/index.jsp");
        }
    }
}
